WO2010023913A1

WO2010023913A1 - Infusion device

Info

Publication number: WO2010023913A1
Application number: PCT/JP2009/004157
Authority: WO
Inventors: 竹林正明; 内藤雅之; 佐々木太; 前原一夫
Original assignee: 株式会社ジェイ・エム・エス
Priority date: 2008-08-29
Filing date: 2009-08-27
Publication date: 2010-03-04
Also published as: KR20110048553A; BRPI0912963A2; JPWO2010023913A1; CN102131537A

Abstract

A bottom tube clamp (8) comprises a tube pressing part (82) and tube bearing part (89), which oppose one another so that a tube (33) passes therebetween in the radial direction; and which are configured so as to, by moving the tube pressing part (82) toward the tube bearing part (89), press a portion of the tube (33) between the tube pressing part (82) and the tube bearing part (89) and stop the flow of fluid inside the tube (33). A projection (82a) is formed on at least one of the tube pressing part (82) and tube bearing part (89), protruding toward the other. The projection (82a) is positioned on the side from which the tube (33) disposed between the tube pressing part (82) and tube bearing part (89) is removed.

Description

Infusion device

The present invention relates to an infusion device capable of preventing free flow.

Conventionally, in the medical field, an infusion device is used when infusion treatment is performed on a patient. The infusion device is provided with a pump unit. A part of a tube extending from the infusion container in which the drug solution or the like is stored to the patient is set in the pump unit. By operating the pump unit, the medical solution or the like in the infusion container can be accurately sent to the patient.

The infusion device is provided with a plurality of sensors for detecting abnormalities in order to perform infusion treatment safely. When an abnormality is detected by the sensor, the pump unit is stopped, and an alarm sound or the like informs the doctor or nurse that an abnormality has occurred. When an abnormality occurs, a doctor, a nurse, etc. confirm the state of the tube according to the type of the abnormality. At this time, for example, when it is necessary to check the state of the tube during the administration of the drug solution to the patient, the drug solution is accumulated in the tube. There is a possibility that the drug solution accumulated in the tube flows toward the patient (hereinafter referred to as free flow), and an incorrect amount of drug solution is administered to the patient.

For example, an infusion device disclosed in Patent Document 1 is known as an infusion device for preventing such free flow. This infusion device includes a case portion that houses a pump portion and the like. This case part has a main-body part and the door supported by the main-body part so that opening and closing was possible.

More specifically, the main body portion is provided with a tube clamp portion composed of a tube pressing portion and a tube receiving portion. On the other hand, the door is provided with a clamp release portion at a portion facing the tube pressing portion. When setting the tube, the tube is allowed to pass between the tube pressing portion and the tube receiving portion. When the door is closed, the clamp release portion abuts the tube pressing portion, moves the tube pressing portion to the side opposite to the tube receiving portion, and is held in a state where the tube is opened. As a result, infusion is possible.

On the other hand, when the door is opened, the clamp release portion of the door is separated from the tube pressing portion, and the tube pressing portion is moved to the tube receiving portion side by the urging member. As a result, the tube is pressed in the radial direction by the tube pressing portion and the tube receiving portion to be crushed and closed. Accordingly, when an abnormality occurs during the infusion treatment and a doctor or nurse or the like opens the door of the infusion device in order to confirm the state of the tube, the tube is blocked by the tube clamp portion. As a result, the flow of the chemical solution or the like in the tube stops and free flow is prevented.

Japanese Patent Publication No. 6-93616

By the way, assuming the situation where an abnormality has occurred in the infusion device, the site is tense and doctors and nurses may accidentally pull the tube set in the infusion device by mistake when checking the tube. Conceivable. In this case, the tube pressing portion and the tube receiving portion of the tube clamp portion in the infusion device of Patent Document 1 have a shape in which the surfaces in contact with the tubes extend straight toward the door side. There is a possibility that the flowed tube will come off from the tube clamp part and free flow will occur.

In addition, when an abnormality occurs during infusion treatment, it is possible that the tube is hooked on something and pulled strongly when the door is opened and the countermeasure is taken. Even in such a case, similarly, there is a possibility that the tube may come off from the tube clamp portion and free flow may occur.

The present invention has been made in view of such points, and the object of the present invention is to provide a tube that can be used even when the tube is accidentally pulled or unintentionally hooked on something. By preventing it from coming off the clamp part, it is intended to prevent free flow and improve the safety of infusion therapy.

In order to achieve the above object, in the first invention, a case portion in which a part of a tube extending from the infusion container is set is provided, and the case portion includes a pump portion for sending the liquid in the infusion container to a patient; A tube clamp portion, and the tube clamp portion includes a tube pressing portion and a tube receiving portion that are arranged to face each other so as to sandwich the tube in the radial direction, and the tube pressing portion is the tube By moving toward the receiving portion, the flow of the liquid in the tube can be temporarily stopped by pressing a part of the tube in the radial direction with the tube pressing portion and the tube receiving portion. In the infusion device, at least one of the tube pressing portion and the tube receiving portion is formed with a protrusion protruding toward the other, and the protrusion is It has a configuration which is positioned at the removal side of the tube which is disposed between the pressing portion and the tube receiving portion.

According to this configuration, since the protruding portion protruding from at least one of the tube pressing portion and the tube receiving portion is positioned on the tube removal side, the tube between the tube pressing portion and the tube receiving portion is on the removal side. When pulled, it will be caught by the protrusion.

As a result, if the tube is pressed by the tube pressing part and the tube receiving part to temporarily stop the flow of liquid in the tube, or if the tube is accidentally pulled strongly, When the tube is hooked and pulled strongly, the tube is difficult to come off from the tube clamp portion.

In the second invention, in the first invention, one of the tube pressing portion and the tube receiving portion is formed so as to extend in the tube insertion direction when being set in the case portion, and is formed by one of the protrusion and the protruding portion. The tube contact side angle is 90 degrees or less.

According to this configuration, when the tube is pulled, the tube is easily caught by the protruding portion, so that the tube is more difficult to come off from the tube clamp portion.

According to a third invention, in the first or second invention, the other of the tube pressing portion and the tube receiving portion is engaged with the protrusion when the tube pressing portion moves toward the tube receiving portion. The engaging recess is provided.

According to this configuration, when the tube pressing portion moves toward the tube receiving portion, the tip of the protruding portion enters the engaging recess, so that when the tube is pulled, the tube is reliably caught on the protruding portion.

In the fourth invention, in the third invention, the width of the protrusion is gradually narrowed toward the tip.

According to this configuration, when the tube pressing portion moves toward the tube receiving portion, the protruding portion is easily engaged with the engaging recess. Thereby, a projection part comes to engage with an engagement recessed part reliably.

According to a fifth aspect of the invention, in any one of the first to fourth aspects, the surface of the protruding portion that is positioned on the tube insertion side is inclined and extends in the tube insertion direction toward the tip of the protruding portion. It was.

According to this configuration, when the tube is set, when the tube is inserted between the tube pressing portion and the tube receiving portion, the surface of the protruding portion on the tube insertion side is inclined and extends in the tube insertion direction. Can be easily inserted.

According to the first invention, the projection is formed on at least one of the tube pressing portion and the tube receiving portion, and the protruding portion is positioned on the tube removal side. In the state where the flow of the liquid is temporarily stopped, when the tube is pulled strongly, the tube is caught by the protruding portion, and is difficult to come off from the tube clamp portion. Thereby, it is possible to prevent a free flow from occurring at the time of dealing with an abnormality occurring during the infusion treatment, and a safe infusion treatment can be performed.

According to the second invention, since the angle formed by one of the tube pressing portion and the tube receiving portion and the protrusion is 90 degrees or less, the pulled tube is easily caught by the protrusion. Thereby, a tube can be made still more difficult to remove | deviate from a tube clamp part.

According to the third invention, when the tube pressing portion moves toward the tube receiving portion, the protruding portion engages with the engaging recess, so that the protruding portion is reliably hooked even when the tube is pulled. be able to.

According to the fourth invention, since the width of the protruding portion is gradually narrowed toward the tip, when the tube pressing portion moves toward the tube receiving portion, the protruding portion is reliably engaged with the engaging recess. It is possible to reliably prevent the tube from coming off.

According to the fifth invention, since the surface located on the tube insertion side in the protrusion is shaped to be inclined in the tube insertion direction toward the tip of the protrusion, the tube can be easily set. An infusion device that is easy to use can be obtained.

1 is a front view of an infusion device according to Embodiment 1. FIG. It is a perspective view of the state where the case part of the infusion device concerning Embodiment 1 was opened. It is A arrow line view in FIG. 3 is a perspective view of a lower tube clamp part according to Embodiment 1. FIG. It is a top view of a tube clamp part when the door of the case part which concerns on Embodiment 1 is closed. It is a top view of a tube clamp part when the door of the case part which concerns on Embodiment 1 is opened. It is a top view when opening the door of the case part which concerns on Embodiment 1, and operating the clamp release lever. It is a front view of the tube press part and tube receiving part which concern on the modification 1 of Embodiment 1. FIG. 6 is a plan view of a tube pressing portion and a tube receiving portion according to Modification 1 of Embodiment 1. FIG. It is a front view of the tube press part and tube receiving part which concern on the modification 2 of Embodiment 1. FIG. It is a top view of the tube press part and tube receiving part which concern on the modification 2 of Embodiment 1. FIG. It is a front view of the tube press part and tube receiving part which concern on the modification 3 of Embodiment 1. FIG. It is a top view of the tube press part and tube receiving part which concern on the modification 3 of Embodiment 1. FIG. FIG. 6 is a diagram corresponding to FIG. 5 according to the second embodiment. FIG. 7 is a view corresponding to FIG. 6 according to the second embodiment. FIG. 8 is a diagram corresponding to FIG. 7 according to the second embodiment.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. It should be noted that the following description of the preferred embodiment is merely illustrative in nature, and is not intended to limit the present invention, its application, or its use.

Embodiment 1 of the Invention
1 and 2 show an infusion device 1 according to Embodiment 1 of the present invention. The infusion device 1 includes a case portion 2 and a drop detector 9. As shown in FIG. 2, a pump unit 4, an upper tube clamp unit 5, a bubble detection sensor unit 6, and a lower tube clamp unit 8 are provided inside the case unit 2. As shown in FIG. 1, an operation unit 10 and a color liquid crystal panel 11 are provided on the front surface of the case unit 2.

This infusion device 1 is arranged at an intermediate portion between the drip chamber 32 and the clamp 34 in a tube 33 extending from the infusion container 31 shown in FIG. 2 to the patient via the drip chamber 32 and the clamp 34. The tube 33 is set in the case part 2 in a posture extending in the vertical direction.

Then, while confirming the setting contents on the color liquid crystal panel 11, the operation unit 10 of the infusion device 1 is operated to set the flow rate and the like of the drug solution L to be administered to the patient. In addition, the pump action of the pump unit 4 is added, so that the drug solution (liquid) L stored in the infusion container 31 can be administered to the patient via the drip chamber 32.

In the following description, for convenience of explanation, unless otherwise indicated, “left” and “right” mean the left side and the right side of the infusion device 1 in use as shown in FIG. “Front” and “rear” mean the front side and the rear side of the infusion device 1 in use as shown in the figure, and “upper” and “lower” mean infusions in use as shown in the figure. The upper side and the lower side of the device 1 are meant respectively.

As shown in FIG. 2, the case portion 2 includes a main body side case 21, a door 22, and a door hinge 23. The door 22 can be opened and closed by the door hinge 23.

As shown in FIG. 1, the case part 2 has a substantially rectangular parallelepiped shape. The operation unit 10 is provided on the front surface portion 22 b of the door 22. The operation unit 10 is provided with various operation buttons for operating the infusion device 1.

In addition, the color liquid crystal panel 11 displays the operating state of the infusion device 1 and various setting information. The operation unit 10 and the color liquid crystal panel 11 are connected to a control unit (not shown).

As shown in FIG. 2, the pump unit 4 is provided in the approximate center of the door facing surface 21 a in the main body side case 21. The pump portion 4 is formed with a ridge portion 41 that protrudes forward and extends along the periphery of the pump portion 4. Cutout portions 41 a are formed at both upper and lower ends of the protrusion 41. The tube 33 is fitted into the cutout portion 41a positioned above and below.

A plurality of fingers 42 extending in the left-right direction are provided inside the ridge portion 41 in a line in the vertical direction. The fingers 42 are moved back and forth in order from the upper finger 42 to the lower finger 42 by a cam and a cam drive mechanism (not shown) provided in the main body side case 21. . The pump unit 4 is also connected to the control unit.

On the main body side case facing surface 22 a of the door 22, a tube pressing portion 43 is provided at a position facing the pump portion 4. When the door 22 is closed, the tube 33 is sandwiched between the tube pressing portion 43 and the finger 42 in the radial direction. Then, by moving the finger 42 back and forth as described above, the tube 33 is appropriately crushed in order from top to bottom. Thereby, the chemical | medical solution L can be sent out toward a patient.

2, an upper tube clamp portion 5 is provided on the upper side of the pump portion 4. The upper tube clamp portion 5 includes a left-side protruding portion 51 that protrudes forward in the left-side portion and a right-side protruding portion 52 that protrudes forward in the right-side portion. The tube 33 passes between the left protrusion 51 and the right protrusion 52. An opening 53 is provided between the left protrusion 51 and the right protrusion 52. From this opening 53, a clamp movable portion 54 protrudes between the tube 33 and the right protrusion 52. This clamp movable part 54 protrudes to the front side of the left protrusion part 51 and the right protrusion part 52, and is configured to be movable left and right by an electric motor (not shown) provided in the main body side case 21. ing. By the movement of the clamp movable portion 54, the tube 33 is switched between a clamped state and an unclamped state. The clamp movable part 54 is controlled by the control part, and is normally in an unclamped state.

Further, the door 22 is provided with a clamp interference avoiding portion 55 at a position facing the upper tube clamp portion 5 on the main body side case facing surface 22a. The clamp interference avoiding portion 55 is recessed so that the main body side case facing surface 22a does not interfere with the upper tube clamp portion 5 when the door 22 is closed.

The bubble detection sensor unit 6 is provided above the upper tube clamp unit 5. The bubble detection sensor unit 6 includes a main body side bubble detection sensor unit 61 provided on the door facing surface 21a of the main body side case 21, and a door side bubble detection sensor unit 62 provided on the main body side case facing surface 22a of the door 22. It has.

The main body side bubble detection sensor unit 61 includes a main body side sensor 61a. The door-side bubble detection sensor unit 62 includes a door-side sensor 62a. The main body side sensor 61a and the door side sensor 62a are ultrasonic sensors. When the door 22 is closed, the main body side sensor 61 a and the door side sensor 62 a sandwich the tube 33 and transmit the ultrasonic wave to the tube 33. At this time, if bubbles are mixed in the chemical liquid L passing through the tube 33, since the ultrasonic transmittance is different between the chemical liquid L and the bubbles, the change in the transmittance is detected, so that the bubbles in the chemical liquid L are detected. The presence of can be detected. The bubble detection sensor unit 6 is connected to the control unit.

2, the lower tube clamp portion 8 is provided below the pump portion 4. The lower tube clamp portion 8 corresponds to the tube clamp portion of the present invention.

As shown in FIGS. 4 to 7, the lower tube clamp portion 8 includes a clamp plate 80, a clamp movable portion 81, a manual clamp release portion 84, and a tube receiving portion 89 (described only in FIGS. 2 and 3). And.

The clamp plate 80 includes a main body plate portion 80a, a spring stopper plate portion 80b, a front shaft support plate portion 80c, a rear shaft support plate portion 80d, a rotation stop plate portion 80e, and a fixing plate portion 80f ( 5 to 7).

The main body plate portion 80a extends in the left-right direction as a whole. The center in the left-right direction of the rear end of the main body plate portion 80a protrudes rearward in a substantially trapezoidal shape, and a screw hole (not shown) is provided at the approximate center of the protruding portion so that the bolt B can be screwed. It has been.

As shown in FIG. 4, a substantially rectangular spring stopper plate 80b that is bent in the thickness direction and extends in the front-rear direction is provided at the left end of the main body plate 80a. As shown in FIG. 5, a screw hole h2 is provided in the spring stopper plate portion 80b. The screw S1 is screwed into the screw hole h2 so that the head thereof is positioned on the right side.

As shown in FIG. 4, a front shaft support plate portion 80c is provided at the right front portion of the main body plate portion 80a. The front shaft support plate portion 80c is formed by being bent in the same direction as the spring stopper plate portion 80b and extends in the left-right direction. As shown in FIG. 5, a through hole H1 penetrating in the front-rear direction is provided at the approximate center of the front shaft support plate portion 80c. A bush B1 is assembled in the through hole H1.

Further, a through hole H2 through which the screw S2 can be inserted in the front-rear direction is provided in the right portion of the front shaft support plate portion 80c. The right side of the clamp plate 80 is fixed to the main body side case 21 by the screw S2 inserted through the through hole H2.

As shown in FIG. 4, a rear shaft support plate portion 80d is provided at the right rear portion of the main body plate portion 80a. The rear shaft support plate portion 80d is formed by being bent in the same direction as the spring stopper plate portion 80b, and extends in the left-right direction. As shown in FIG. 5, a through hole H3 is provided on the right side of the rear shaft support plate portion 80d, coaxially with the through hole H1 of the front shaft support plate portion 80c. A screw hole h3 is provided on the left side of the rear shaft support plate portion 80d.

As shown in FIG. 4, a rotation stop plate 80e is provided at the right end of the main body plate 80a. The rotation stop plate portion 80e is formed by being bent in the same direction as the spring stop plate portion 80b, and extends in the front-rear direction.

As shown in FIG. 5, a fixing plate portion 80f is provided on the left side of the main body plate portion 80a. The fixing plate portion 80f is provided with a through hole (not shown) through which the screw S3 can be inserted in the front-rear direction. The left side of the clamp plate 80 is fixed to the main body side case 21 by the screw S3 inserted through the through hole.

As shown in FIGS. 4 to 7, the clamp movable portion 81 includes a clamp movable portion main body 83 and a tube pressing portion 82 formed in the front portion thereof. As shown in FIG. 3, the tube 33 is inserted and set between the tube pressing portion 82 and the tube receiving portion 89 in a posture extending in the vertical direction. The insertion direction when the tube 33 is set is from the front side to the rear side of the infusion device 1.

As shown in FIG. 5, the tube pressing portion 82 is formed in a substantially rectangular parallelepiped extending in the front-rear direction. That is, the tube pressing portion 82 extends in the same direction as the insertion direction when the tube 33 is set. The width (the dimension in the vertical direction) corresponding to the tube longitudinal direction in the right side portion of the tube pressing portion 82 is gradually narrowed toward the right side. Further, on the left side of the tube pressing portion 82, a plate-shaped clamp reinforcing portion 82b is formed which gradually becomes wider toward the left side from the center in the front-rear direction of the tube pressing portion 82 to the rear end.

The front end of the tube pressing portion 82 is provided with a protruding portion 82a that protrudes toward the right side. The protruding direction of the projecting portion 82a and the extending direction of the tube pressing portion 82 are orthogonal to each other. In other words, the angle α (shown only in FIG. 5) on the side where the tube 33 in the set state, which is formed by the tube pressing portion 82 and the protruding portion 82a, is 90 degrees. The angle α is preferably smaller than 90 degrees, and may be 80 degrees or 70 degrees, for example.

The front surface of the protrusion 82a is inclined so as to be located on the rear side as it goes to the right side. When setting the tube 33, the tube 33 is moved from the front side to the rear side and inserted between the tube pressing portion 82 and the tube receiving portion 89, so that the front surface of the protruding portion 82a faces the insertion side of the tube 33 when set. It is a surface to be located. That is, the surface located on the insertion side of the tube 33 when being set out of the outer surface of the protruding portion 82a extends obliquely in the tube insertion direction (rear side) toward the tip of the protruding portion 82a.

Moreover, as shown in FIG. 3, the width of the protruding portion 83 in the tube longitudinal direction is gradually narrowed toward the right side (tip).

As shown in FIGS. 5 to 7, a connecting portion 83 a is formed in the front portion of the clamp movable portion main body 83. The rear end of the tube pressing portion 82 is connected to the front surface of the connecting portion 83a. At the front end portion of the connecting portion 83a, a protruding portion 83f that protrudes in the left direction and extends in the tube longitudinal direction is formed.

A clamp movable part plate 83b is provided behind the connecting part 83a in the clamp movable part body 83 so as to protrude rightward. A ridge wall portion 83c is provided on the outer peripheral edge of the clamp movable portion plate 83b. On the right side of the ridge wall portion 83c, the center in the front-rear direction is gently curved toward the right side. Further, a cylindrical portion 83d extending in the tube longitudinal direction is formed behind the protruding wall portion 83c in the clamp movable portion main body 83. Further, a protrusion 83e protruding toward the left side is formed at the center in the front-rear direction of the left side portion of the ridge wall portion 83c.

The clamp movable portion 81 can rotate around the axis of the bolt B with respect to the main body plate portion 80a by inserting the bolt B into the cylindrical portion 83d and screwing it into a screw hole (not shown) in the main body plate portion 80a. Assembled into. A pressing spring Sp1 made of a coil spring is disposed between the clamp movable part main body 83 and the spring stopper plate part 80b. This push spring Sp1 is for urging the clamp movable part 81 to the right around the axis of the bolt B. The head of the screw S1 is inserted into one end opening of the pressing spring Sp1, and the protrusion 83e is inserted into the other end opening.

The manual clamp release portion 84 includes a clamp release lever 85, a cam portion 86, and a shaft 87. As shown in FIG. 3, the clamp release lever 85 includes a lever portion 85 a that extends vertically and a shaft fitting portion 85 b that is positioned below the lever portion 85 a. The shaft fitting portion 85b has a substantially cylindrical shape extending in the front-rear direction. As shown in FIG. 4, a recess 85c is provided on the rear side of the shaft fitting portion 85b.

The cam part 86 includes a substantially elliptical cam part body 86a and a roller part 86b. A cutout portion 86c is provided on the outer surface of the cam portion main body 86a. As shown in FIG. 4, the cam portion main body 86a is formed with a through hole H5 penetrating in the front-rear direction.

The roller portion 86b includes a roller portion support shaft 86d and a roller body portion 86e. The roller body 86e is rotatably provided at the center in the center axis direction of the roller support shaft 86d in a state where the center axis thereof coincides with the center axis of the roller support shaft 86d. The roller portion 86b is assembled to the cam portion main body 86a in a state where the roller portion support shaft 86d is inserted through the through hole H5 formed in the cam portion main body 86a. At this time, as shown in FIG. 5, the front end portion of the roller portion support shaft 86d protrudes further forward than the front surface portion 86f of the cam portion main body 86a.

A through hole (not shown) penetrating in the front-rear direction is provided in the right portion of the cam portion main body 86a, and a shaft 87 can be inserted into the through hole.

The shaft 87 extends in the front-rear direction, and is formed into a bush B1 assembled in a through hole H1 formed in the front shaft support plate portion 80c, and a bush B2 assembled in a through hole H3 formed in the rear shaft support plate portion 80d. The clamp plate 80 is rotatably supported in the inserted state. As shown in FIG. 7, a long hole 86 g extending in the circumferential direction is provided in the right portion of the cam portion main body 86 a of the cam portion 86. A screw S8 is fastened to the shaft 87 through an elongated hole 86g.

An E-type retaining ring R fitted on the shaft 87 is disposed before and after the cam portion 86 so that the cam portion 86 does not move back and forth on the shaft 87.

As shown in FIG. 4, the front end portion of the shaft 87 is inserted into the recess 85 c of the clamp release lever 85. The clamp release lever 85 is fixed to the shaft 87 by tightening a screw S4 provided on the right side of the shaft fitting portion 85b.

A torsion spring Sp2 is provided between the cam portion 86 and the front shaft support plate portion 80c. As shown in FIG. 5, one end portion of the wire constituting the torsion spring Sp2 is in contact with the main body plate portion 80a, and the other end portion is in contact with the roller portion support shaft 86d.

When the shaft 87 is rotated clockwise as viewed from the front, the screw S8 fastened to the shaft 87 comes into contact with and engages with the left end of the elongated hole 86g of the cam portion main body 86a. Thereby, the cam part 86 can be rotated clockwise. At this time, the cam portion 86 is urged counterclockwise by the torsion spring Sp2.

An E-type retaining ring R fitted into the shaft 87 is disposed between the torsion spring Sp2 and the bush B1, so that the position of the torsion spring Sp2 does not shift in the front-rear direction. Further, an E-type retaining ring R fitted on the shaft 87 is also arranged in front of the rear shaft support plate portion 80d, and the E-type retaining ring R, and the E-type retaining ring between the torsion spring Sp2 and the bush B1. The shaft 87 prevents the shaft 87 from shifting in the front-rear direction.

A set screw S5 is attached between the cam portion 86 and the rear shaft support plate portion 80d of the shaft 87. When the shaft 87 rotates counterclockwise when viewed from the front, the set screw S5 comes into contact with the rotation-preventing plate portion 80e, so that the shaft 87 does not further rotate in the same direction.

A torsion spring Sp3 is provided at the rear end of the shaft 87. One end portion of the wire constituting the torsion spring Sp3 is inserted into the shaft 87, and the other end portion is attached to a spring support portion 87a provided in parallel with the shaft 87 on the left side portion of the rear shaft support plate portion 80d. In contact. The spring support 87a has a cylindrical shape and is attached to the rear shaft support plate 80d by a screw S6. A screw S7 is attached to the rear end of the shaft 87, and the torsion spring Sp3 is prevented from being detached from the shaft 87 and the spring support portion 87a by the heads of the screw S6 and the screw S7. When the shaft 87 is rotated clockwise as viewed from the front, the shaft 87 is biased counterclockwise by the torsion spring Sp3.

When the clamp release lever 85 is rotated clockwise as viewed from the front, the shaft 87 is rotated in synchronization with the clamp release lever 85, and the screw S8 fastened to the shaft 87 is the length of the cam portion main body 86a. It contacts the left end of the hole 86g. Then, the cam portion 86 also rotates in synchronization with the shaft 87, and the roller main body portion 86 e of the cam portion 86 contacts the right side of the ridge wall portion 83 c in the clamp movable portion 81. When the clamp release lever 85 is further rotated, the clamp movable portion 81 is pushed to the left side by the roller main body portion 86e, and the interval between the tube pressing portion 82 and the tube receiving portion 89 is increased as shown in FIG. Can be spread. At this time, the roller main body portion 86e contacts the ridge wall portion 83c while rotating and pushes the ridge wall portion 83c to the left side, so that the tube pressing portion 82 can be pushed smoothly to the left side.

When the clamp release lever 85 is further rotated, the roller main body portion 86e enters between the right side of the ridge wall portion 83c and the main body plate portion 80a, thereby moving the clamp against the urging force of the push spring Sp1. The part 81 can be stopped. That is, the clamp movable part 81 can be fixed at a position left moved to the left. When the hand is released from the clamp release lever 85 in this state, the clamp release lever 85 and the shaft 87 are rotated counterclockwise as viewed from the front by the torsion spring Sp3, and the set screw S5 comes into contact with the rotation stop plate portion 80e. At that point, it has come to stop.

As shown in FIG. 3, an opening 88 is formed in the lower part of the main body side case 21. The tube receiving portion 89 is formed so as to protrude forward from the right side of the opening 88 in the main body side case 21. Further, a tube pressing portion 82 projects forward from the opening 88.

An engaging recess 89a is provided on the left side of the front portion of the tube receiving portion 89 so as to open to the left side. The vertical width of the engagement recess 89 a is formed wider than the vertical width of the protrusion 82 a provided at the tip of the tube pressing portion 82. When the tube pressing portion 82 moves to the right side, the tip of the projection 82a enters the engagement recess 89a and engages. Further, the vertical width of the engaging recess 89a becomes wider toward the left side.

Further, as shown in FIG. 2, the door 22 is provided with a concave tube clamp interference avoiding portion 8a at a position facing the lower tube clamp portion 8 on the main body side case facing surface 22a. At the center of the tube clamp interference avoiding portion 8a, a clamp release protrusion 8b is formed that protrudes toward the protrusion 82a of the tube pressing portion 82 when the door 22 is closed. As shown in FIGS. 5 to 7, the clamp release protrusion 8 b is inclined so that its left side surface is positioned on the right side as it goes to the front end side (rear side) in the protruding direction.

As shown in FIG. 5, when the door 22 is closed, the clamp release protrusion 8b abuts the protrusion 82a, so that the clamp release protrusion 8b moves the clamp movable part 81 to the left against the biasing force, The tube 33 is opened.

Further, as shown in FIG. 6, when the door 22 is opened, the clamp release protrusion 8b is separated from the protrusion 82a of the tube pressing portion 82. Thereby, the clamp movable part 81 moves to the right side by the urging force of the pressing spring Sp1. Then, the tube 33 is pressed in the radial direction by the tube pressing portion 82 and the tube receiving portion 89 to be closed.

Further, as shown in FIG. 7, when the clamp release lever 85 is rotated clockwise as viewed from the front in the state where the door 22 is opened, the clamp movable portion 81 is pushed to the left and the tube 33 is opened. .

Moreover, as shown in FIG. 2, the drop detector 9 has a substantially rectangular parallelepiped shape. A drip chamber holding portion 91 having a shape penetrating in the vertical direction is formed at the center of the drop detector 9 so as to sandwich the drip chamber 32. The drop detector 9 includes a light emitting element and a light receiving element that are arranged so as to sandwich the drip chamber 32. The light emitted from the light emitting element toward the light receiving element is blocked by the drop falling in the drip chamber 32, and the drop can be detected by the change in the amount of light received at this time.

Next, the case where the infusion device 1 is used will be described. The operator prepares an infusion container 31, a drip chamber 32, a tube 33, and a clamp 34. The door 22 of the infusion device 1 is opened, and the tube 33 is set in the main body side case 21.

At this time, the clamp release lever 85 is rotated clockwise as viewed from the front. When the clamp release lever 85 is rotated, the tube pressing portion 82 moves to the left side, and the interval between the tube pressing portion 82 and the tube receiving portion 89 increases. When the clamp release lever 85 is further rotated, the clamp movable portion 81 is fixed while moving to the left side. When the hand is released from the clamp release lever 85 in this state, the clamp release lever 85 and the shaft 87 are rotated by the torsion spring Sp3 and stopped when the set screw S5 comes into contact with the rotation stop plate 80e.

After that, close Clemme 34. Next, a part of the tube 33 extending from the drip chamber 32 to the clamp 34 is passed through the front surface of the main body side sensor 61a in the bubble detection sensor unit 6, and between the left protrusion 51 and the clamp movable unit 54 in the upper tube clamp unit 5. To place. Further, the tube 33 is fitted into the notch 41 a of the pump unit 4 and is passed between the tube pressing unit 82 and the tube receiving unit 89 in the lower tube clamp unit 8.

When the door 22 is closed after setting the tube 33, as shown in FIG. 5, the clamp release protrusion 8b abuts the protrusion 82a, and the tube pressing part 82 moves to the left. When the tube pressing portion 82 moves to the left side, the roller main body portion 86e moves away from the ridge wall portion 83c as shown in FIG. Thereby, the cam part 86 is rotated by the urging force of the torsion spring Sp2, and stops when the screw S8 contacts the left end of the elongated hole 86g.

Also, the drip chamber 32 is set in the drip chamber holding part 91 in the drop detector 9.

After that, open the clamp 34.

Next, an operator such as a doctor or a nurse operates the operation unit 10 to turn on the power. When the control unit of the infusion device 1 starts up, the operation unit 10 is operated while looking at the color liquid crystal panel 11 to set the flow rate of the drug solution L to be administered to the patient. When the setting is completed, administration of the drug solution L is started for the patient.

When the control unit detects an abnormality based on the signals sent from the bubble detection sensor unit 6 and the drop detector 9 after the pump unit 4 is actuated and administration of the liquid medicine L is started to the patient The control unit stops the pump unit 4 and displays a warning or the like on the color liquid crystal panel 11. The display on the color liquid crystal panel 11 informs the operator that an abnormality has occurred. For example, when bubbles are detected by the bubble detection sensor unit 6, a doctor, a nurse, or the like checks whether bubbles are mixed in the liquid medicine L in the tube 33. At this time, when the door 22 of the infusion device 1 is opened, as shown in FIG. 6, the clamp release protrusion 8b is separated from the protrusion 82a, so that the clamp movable part 81 moves to the right side by the urging force of the push spring Sp1. The tube 33 is pressed by the tube pressing portion 82 and the tube receiving portion 89. Thereby, the flow of the chemical liquid L stops.

Here, it is confirmed by a doctor, a nurse or the like whether or not air bubbles are mixed in the liquid medicine L in the tube 33. At this time, since the protrusion 82a is formed on the tube pressing portion 82 on the tube 33 removal side (front side) of the tube pressing portion 82, before the doctor 34, the nurse, or the like closes the clamp 34, it is necessary to Even when the tube 33 is pulled strongly by mistake, or when the tube 33 is hooked on something and pulled strongly, the tube 33 is caught by the protrusion 82a, so that the tube 33 is not detached from the lower tube clamp portion 8. And free flow can be prevented.

When the door 22 is closed after the doctor or nurse has taken action for the abnormality, as shown in FIG. 5, the clamp release protrusion 8b abuts the protrusion 82a, and the tube pressing part 82 moves. The tube 33 is opened. Then, the pump part 4 is operated and administration of the chemical | medical solution L is restarted with respect to a patient.

As described above, according to the infusion device 1 according to this embodiment, when the door 22 is opened when an abnormality occurs during the infusion, the clamp release protrusion 8b is separated from the protrusion 82a of the tube pressing portion 82. The tube 33 can be closed. At this time, since the tube pressing portion 82 has a protruding portion 82a on the removal side of the tube 33, even if the tube 33 is strongly pulled, it is caught by the protruding portion 82a and does not come off the lower tube clamp portion 8. Thereby, free flow can be prevented and infusion treatment can be performed safely.

In addition, since the tube contact side angle α formed by the tube pressing portion 82 extending in the insertion direction of the tube 33 and the protruding portion 82a protruding from the tube pressing portion 82 is 90 degrees, the tube 33 is pulled. The tube 33 is easily caught on the protrusion 82a. Thereby, the tube 33 is further less likely to be detached from the lower tube clamp portion 8.

Also, when the tube pressing portion 82 moves toward the tube receiving portion 89, the tip of the protruding portion 82a enters the engaging recess 89a, so that the tube 33 is reliably caught on the protruding portion 82a.

Further, since the width of the protruding portion 82a is gradually narrowed toward the tip, when the tube pressing portion 82 moves toward the tube receiving portion 89, the tip of the protruding portion 82a engages with the engaging recess 89a. It becomes easy to do. Thereby, the projection part 82a can be reliably engaged with the engagement recessed part 89a.

In addition, since the tube insertion side surface of the protrusion 82a is inclined toward the distal end in the tube insertion direction, the tube 33 is inserted when the tube 33 is inserted between the tube pressing portion 82 and the tube receiving portion 89. Easy work.

Further, as in the first modification of the first embodiment shown in FIGS. 8 and 9, the shapes of the protrusion 82a and the tube receiving portion 89 may be changed. That is, as shown in FIG. 8, at the distal end portion of the tube pressing portion 82, the upper protruding portion 17 a that protrudes rightward from the upper portion of the tube pressing portion 82 and the rightward protrusion from the lower portion of the tube pressing portion 82. A lower protrusion 17b is formed. As shown in FIG. 9, the front surfaces of the upper protrusion 17a and the lower protrusion 17b are inclined so as to be located on the rear side as going to the right side. Further, the upper protruding portion 17a and the lower protruding portion 17b are positioned so as to sandwich the tube receiving portion 89 in the vertical direction.

In the first modification, since the upper protrusion 17a and the lower protrusion 17b are formed so as to sandwich the tube receiving portion 89, the tube 33 can be connected to the lower tube clamp portion even when the tube 33 is pulled unexpectedly. A structure that is less likely to come off than 8 can be obtained.

The shape of the tube receiving portion 89 is not limited to the above, and a portion facing the tube pressing portion 82 may have a shape in which the width in the tube longitudinal direction becomes gradually narrower toward the tube pressing portion 82.

Moreover, the shape of the tube receiving portion 89 may be the same as that of the second modification of the first embodiment shown in FIGS. In the second modification, when the tube 33 is pressed, the protrusion 82 a is positioned forward of the front end surface of the tube receiving portion 89.

Also, as in Modification 3 of Embodiment 1 shown in FIGS. 12 and 13, a protrusion 82c may be formed at the tip of the protrusion 82a. Thereby, when the clamp movable part 81 moves to the right side and presses the tube 33, the tip of the projection 82 c and the front end surface of the tube receiving part 19 come close to each other, so that the tube 33 is removed from the lower tube clamp part 8. It becomes more difficult to come off.

<< Embodiment 2 of the Invention >>
14 to 16 show the lower tube clamp portion 8 of the infusion device 1 according to Embodiment 2 of the present invention. The infusion device 1 of the second embodiment is different from the first embodiment except that the structure of the lower tube clamp portion 8 is the same as the first embodiment. To do.

That is, the clamp movable portion 81 according to the second embodiment is provided with a stopper portion 13 and a push rod 151 c for operating the fastener 13.

The clasp portion 13 is made of a leaf spring material, and extends forward from the left side of the ridge wall portion 83c, and then extends rightward along the front side of the ridge wall portion 83c. A stopper portion 13 a that protrudes rearward is provided at the right end of the clasp portion 13. The stopper part 13 has a shape that biases the stopper part 13a forward.

The cam portion 141 includes a substantially elliptical cam portion main body 141a and a roller portion 142. The cam body 141a is provided with a notch 141b. The roller part 142 is rotatably assembled in the notch part 141b. A through hole (not shown) penetrating in the front-rear direction is provided in the right portion of the cam portion main body 141a, and a shaft 87 is inserted into the through hole. The cam portion 141 and the shaft 87 are fastened by a screw S8. When the shaft 87 rotates, the cam portion 141 also rotates in synchronization therewith.

The left side of the tube receiving portion 151 is provided with an engaging recess 151a into which the protruding portion 82a of the tube pressing portion 82 is fitted and engaged. A through hole 151b extending in the front-rear direction is formed on the right side of the engagement recess 151a of the tube receiver 151. The through hole 151b has a circular cross section. The through hole 151b has a step-like small diameter on the front side compared to the rear side.

A push rod 151c is inserted through the through hole 151b. The push rod 151c has a circular cross section so as to correspond to the shape of the through hole 151b, and the front side has a smaller diameter stepwise than the rear side. The push rod 151c can slide in the through hole 151b in the front-rear direction.

As shown in FIG. 15 and FIG. 16, when the push rod 151 c is slid forward, the front portion protrudes forward from the front end surface of the tube receiving portion 151. As shown in FIG. 14, when the push rod 151c is slid rearward, the rear end portion comes into contact with the clasp portion 13, and the clasp portion 13 is elastically displaced rearward.

Further, the door 22 is provided with a concave tube clamp interference avoiding portion 16 at a position facing the lower tube clamp portion 8 on the main body side case facing surface 22a. On the right side of the tube clamp interference avoiding portion 16, a clamp releasing portion 16 a that abuts with the protruding portion 82 a when the door 22 is closed is formed.

As shown in FIG. 14, when the door 22 is closed, the clamp release portion 16a abuts against the projection 82a, whereby the clamp release portion 16a moves the clamp movable portion 81 to the left side, and the tube 33 is opened. .

Further, as shown in FIG. 15, when the door 22 is opened, the clamp releasing portion 16a is separated from the protruding portion 82a. Thereby, the clamp movable part 81 moves to the right side, and the tube 33 is pressed.

In addition, as shown in FIG. 16, when the clamp release lever 85 is rotated clockwise as viewed from the front in a state where the door 22 is opened, the roller portion 142 of the cam portion 141 protrudes from the clamp movable portion 81. It contacts the right side of the strip wall 83c. When the clamp release lever 85 is further rotated, the clamp movable portion 81 is pushed to the left by the roller portion 142, and the tube 33 is opened. Then, the stopper portion 13a of the clasp portion 13 comes into contact with the left end of the front shaft support plate portion 80c, and the clamp movable portion 81 is held while being positioned on the left side.

As shown in FIG. 14, when the door 22 is closed, the main body side case facing surface 22a and the front end portion of the push rod 151c come into contact with each other, and the push rod 151c is pushed backward to slide. Then, the rear end portion of the push rod 151c elastically deforms the clasp portion 13 rearward, and the stopper portion 13a is detached from the front shaft support plate portion 80c. Thereby, the clamp movable part 81 moves to the right side. And since the projection part 82a of the tube press part 82 and the clamp release part 16a collide, the clamp movable part 81 is fixed in the position which does not obstruct | occlude the tube 33. FIG.

Next, the case where the infusion device 12 is used will be described. The door 22 of the infusion device 12 is opened, and the tube 33 is set in the main body side case 21. At this time, as shown in FIG. 16, the clamp release lever 85 is operated to move the clamp movable portion 81 to the left side.

When the door 22 is closed after setting the tube 33, as shown in FIG. 14, the push rod 151c slides backward, and the stopper portion 13a of the stopper portion 13 is detached from the front shaft support plate portion 80c. When the stopper portion 13a is disengaged from the front shaft support plate portion 80c, the clamp movable portion 81 moves to the right side, and the protruding portion 82a collides with the clamp release portion 16a.

When the door 22 of the infusion device 12 is opened by a doctor or nurse during use, as shown in FIG. 15, the clamp release portion 16a moves away from the projection 82a, so that the clamp movable portion 81 moves to the right. To do. Thereby, the tube 33 is pressed by the tube pressing part 82 and the tube receiving part 151, and the flow of the chemical | medical solution L stops.

Note that when the door 22 is closed, the clamp release portion 16a abuts on the protrusion 82a, so that the tube pressing portion 82 moves to the left side and the tube 33 is opened. Thereby, the administration of the drug solution L can be resumed.

As described above, according to the infusion device 12 according to the second embodiment, as in the infusion device 1 of the first embodiment, since the projection 82a is formed on the tube pressing portion 82, the tube 33 is pulled strongly. Even if it is done, it does not come off from the lower tube clamp part 8, thereby preventing a free flow and performing an infusion treatment safely.

In the first and second embodiments, the protrusion 82 a is provided on the tube pressing portion 82, but a protrusion that protrudes toward the tube pressing portion 82 may be provided on the tube receiving portion 89.

Further, each of the tube pressing portion 82 and the tube receiving portion 89 may be provided with a protruding portion that protrudes toward the other side.

As described above, the infusion device according to the present invention is suitable for administering a medicinal solution to a patient at a medical site, for example.

DESCRIPTION OF SYMBOLS 1 Infusion apparatus 2 Case part 31 Infusion container 33 Tube 4 Pump part 8 Lower tube clamp part 82 Tube press part 82a Projection part 89,151 Tube receiving part 89a Engagement recessed part L Chemical solution

Claims

A case portion in which a part of a tube extending from the infusion container is set,
The case part is
A pump part for sending the liquid in the infusion container to the patient, and a tube clamp part,
The tube clamp is
A tube pressing portion disposed opposite to each other so as to sandwich the tube in the radial direction, and a tube receiving portion,
By moving the tube pressing portion toward the tube receiving portion, a part of the tube is pressed in the radial direction by the tube pressing portion and the tube receiving portion to temporarily flow the liquid in the tube. An infusion device configured to be capable of being stopped,
At least one of the tube pressing portion and the tube receiving portion is formed with a protruding portion that protrudes toward the other,
The infusion device according to claim 1, wherein the protrusion is positioned on a removal side of a tube disposed between the tube pressing portion and the tube receiving portion.
The infusion device according to claim 1,
One of the tube pressing portion and the tube receiving portion is formed so as to extend in the tube insertion direction when being set in the case portion, and the tube in the set state, which is formed by one of the tube pressing portion and the protruding portion, abuts on the tube. An infusion device having a side angle of 90 degrees or less.
The infusion device according to claim 1 or 2,
An infusion solution, wherein the other of the tube pressing portion and the tube receiving portion is provided with an engaging recess that engages with the protrusion when the tube pressing portion moves toward the tube receiving portion. apparatus.
The infusion device according to claim 3,
An infusion device characterized in that the width of the protrusion gradually becomes narrower toward the tip.
In the infusion device according to any one of claims 1 to 4,
Of the outer surfaces of the protrusions, the surface located on the tube insertion side when set in the case part extends in an inclined direction in the tube insertion direction toward the tip of the protrusions, apparatus.